A5048033897- Diatoms and Algae Research
- Microbial Community Ecology and Physiology
- Marine and coastal ecosystems
- Protist diversity and phylogeny
- Aquatic Ecosystems and Phytoplankton Dynamics
- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Analytical chemistry methods development
- Insect and Pesticide Research
- Paleontology and Stratigraphy of Fossils
- Marine Biology and Environmental Chemistry
- Environmental Science and Water Management
- Soil and Environmental Studies
- Aquatic and Environmental Studies
- Marine Biology and Ecology Research
- Genomics and Phylogenetic Studies
- Animal and Plant Science Education
- Marine and environmental studies
- Algal biology and biofuel production
- Marine Toxins and Detection Methods
- Mass Spectrometry Techniques and Applications
- Aquatic Invertebrate Ecology and Behavior
- Polar Research and Ecology
- Environmental Toxicology and Ecotoxicology
Russian Academy of Natural Sciences
2021-2024
Russian Academy of Sciences
2016-2024
A.O. Kovalevsky Institute of Biology of the Southern Seas
2023-2024
Baikal Nature Reserve
2016-2019
Nesting of Leptochilus limbiferus (Morawitz, 1867) was observed in the Krasnodar Territory, Russia. Twelve nests were studied; all them located empty shells a terrestrial snail species, Xeropicta derbentina (Krynicki). The building material used by wasps pellets dry soil and gravel particles, as well shell bits, sometimes also tiny shells. Females hunted for caterpillars gelechiid moth Syncopacma coronillella (Treitschke) two unidentified species. Imagoes L. feeding on nectar at flowers five...
Type material of Navicula kotschyi was studied, and this species transferred to Dorofeyukea gen. nov. as D. comb. described on the basis DNA sequence morphological data. Additional assigned genus that were previously included in include: ancisa nov., grimmei ivatoensis orangiana rostellata & stat. savannahiana tenuipunctata texana All share same features, including having a narrow stauroid fascia surrounded by 1-3 irregularly shortened striae, uniseriate, weakly radiate circular, or...
Fragilaria and Ulnaria are two closely related diatom genera for which the delimitation circumscription of several species is unclear. We studied strains isolated from Lake Baikal compared them with freshwater reservoirs in Europe Asia using phylogenetic methods, microscopy interclonal crossing experiments. The results analyses fragments rbcL 18S rRNA genes revealed that baikalian F. radians clade was independent representatives genus other localities. Among we found following tree groups at...
Abstract Molecular phylogenetic analyses place Ardissonea crystallina (C. Agardh) Grunow and all Toxariids among the bi- multipolar centric diatoms, almost always recovered as a derived lineage sister to Lampriscus . In centrics where sexual reproduction has been documented, oogamy, with larger immobile eggs smaller flagellated sperm observed. We were able initiate both homothallic heterothallic in A. The turned out be non-oogamous; gametes more or less equal size but no cells detected. At...
Sexual reproduction and mating system of the freshwater diatom Ulnaria ulna (Nitzsch) Compère were studied by using clonal cultures.Mating species involves homo-and heterothallic modes reproduction; both male female clones capable homothallic reproduction.Two types gametogenesis corresponding to two investigated.Analysis crossing table, gamete morphology, sex distribution in progeny resulted from intraclonal provided evidences that anisogamy determined U. genetically; hetero-and homogametic...
A new species from Vietnam, Cryptomonas vietnamica sp.nov., is described based on morphological and molecular data.Six strains different habitats were analyzed.Cryptomonas characterized by large cells up to 54 µm long, 30 wide 20 thick, flattened in dorso-ventral plane often twisted.Phylogenetic relationships inferred nuclear small subunit ribosomal DNA sequences show that the forms a clade with lundii, rare taxon, Europe.Cryptomonas lundii reported for first time Russia second since its...
Strains of Mallomonas mangofera var. and M. foveata from Russia Vietnam were studied. Their phylogenetic position was revealed using the SSU rDNA + rbcL cpDNA dataset. The ultrastructure scales bristles studied transmission scanning electron microscopy. Based on these studies, a new combination proposed: comb. et stat. nov. problems associated with identification determination scale morphotype belonging to this taxon are discussed, emended formal description holotype proposed. literature...
The traditional taxonomic affiliation of the diatom Ardissonea crystallina (C. Agardh) Grunow has been recently questioned, as it exhibits a mixture polar centric and araphid pennate characters. Overall valve architecture mode sexual reproduction suggest that pennates are its closest relatives. On other hand, recovered molecular phylogenies consistently place among centrics. Our investigation earliest stages morphogenesis, formation basal silica layer, adds to argument A. is indeed diatom....
Diatoms are capable of accumulating substantial amounts triacylglycerides in their cells, which differ the composition fatty acids depending on conditions cultivation, making them attractive subjects biotechnology. In present study, we characterized structural features lipid bodies diatom Entomoneis cf. paludosa (W. Smith) Reimer strain 8.0727-B and revealed peculiarities acid cultures during stationary exponential growth phases. Laser scanning confocal microscopy an increased number...
Strains of Mallomonas favosa f. and gemina from Vietnam have been studied. Their phylogenetic position was revealed using the SSU rDNA + rbcL cpDNA dataset. The ultrastructure scales bristles studied transmission scanning electron microscopy. A new combination proposed: comb. et stat. nov. morphological features species are discussed in this paper. Based on a revision published data, distribution clarified. is recorded mainly tropical subtropical areas Asia.
The Mallomonas pseudomatvienkoae species complex was investigated in a tropical region using light and electron microscopy molecular methods. Based on study of 37 algal cultures belonging to the M. morphotype, three clades were identified based datasets (SSU rDNA, rbcL ITS rDNA). For first time (Vietnam), presence pseudomatvienkoae, originally described South Korea, confirmed by original description contains data only scanning microscopic observations. Here, we provide our strains both...
This research is devoted to the study of Mallomonas mangofera species complex in a tropical region using electron microscopy and molecular methods. Based on nine algal cultures belonging morphotype, two new clades were identified based SSU rDNA + rbcL cpDNA ITS1-5.8S-ITS2 datasets. Two species, hippocrepica M. kornevae, described from Vietnam characteristics morphological analysis scale bristle ultrastructure. The distribution these taxa was analysed information strains origin metabarcoding...
Sexual reproduction and mating system of the freshwater diatom Ulnaria acus (Bacillariophyta) was described for first time.Mating species includes, apparently, only heterothallic way reproduction: during three-year observation period neither male nor female clones have shown ability to reproduce homothallically.The type sexual is cis-anisogamous; in many details it similar with closely related ulna, Tabularia fasciculata, tabulata.
Araphid diatoms of the genus Ulnaria are dominant species in many freshwater ecosystems Eurasia. Diatom populations genetically heterogeneous and represent a combination different genotypes. Genetic diversity is necessary factor for adaptation to environmental conditions successful dispersal species. We were analyzed genetic danica ulna using example monoclonal strains isolated from geographically distant water bodies continental part Eurasia: Lake Ritsa, Goluboe Baikal. Phylogenetic...
Abstract. Ulnaria a us is cosmopolitan freshwater diatom. As rule, diatom populations represent combination of different genotypes. In early study, using fragment the rbcL gene U. acus strains isolated from geographically distant regions, no significant genetic differences were found in this species. paper, we analyzed 41 regions Eurasia. Based on analysis 18S rRNA fragment, it was shown that all form single clade consisting acus. Phylogenetic cox1 genes revealed Eurasian three clades....